Stock Incentive Plan Compensation Cost (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	$ 227	$ 144	$ 52
Income Tax Expense (Benefit)	(79)	(33)	(1)
Allocated Share-based Compensation Expense, Net of Tax	148	111	51
Stock Unit Awards and Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	210	92	0
Income Tax Expense (Benefit)	(73)	(32)	0
Allocated Share-based Compensation Expense, Net of Tax	137	60	0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense	17	52	52
Income Tax Expense (Benefit)	(6)	(1)	(1)
Allocated Share-based Compensation Expense, Net of Tax	$ 11	$ 51	$ 51
Stock Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Awards Issued	50.00%
Stock Unit Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Awards Issued	50.00%